Ms Lindholm and Mr Trabert, both of Reservoir, and Mr Ryan, of Meadow Heights, have been charged with murdering Mr Amey.

Reading from the police prosecution summary of the case at the start of a committal hearing for the three accused, Mr Silbert said Mr Amey was attacked in the underground car park of his Hawthorn apartment block just after 11.20pm on December 10 last year before being placed in the boot of a car and driven away.

Mr Amey's body was found wedged between boulders at a peak on the north side of Mount Korong on December 18.

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"He was wrapped in a canvas sheet and rope had been tied around his neck and lower legs in a hog-tied manner," Mr Silbert said.

The cause of death was multiple injuries including stab wounds, fractured ribs and neck injuries.

Mr Silbert said Ms Lindholm had been in a relationship with Mr Amey which had ended badly. They had been due in court over a property dispute the day after Mr Amey had been attacked and disappeared.

After their arrest, Mr Silbert said Mr Trabert admitted to police that he and Mr Ryan had assaulted Mr Amey to stop him from attending court the next day for the property settlement hearing.

"He said that they were armed with a baseball bat and that they incapacitated the deceased (Mr Amey) with the use of a Taser," Mr Silbert told the court.

After dumping the body, Mr Trabert said he, Ms Lindholm and Mr Ryan drove back to Kyneton before parting company.

Mr Trabert and Ms Lindholm then collected a yellow motorcycle and rode to a secluded spot in Kyneton where they had sex before riding back to Melbourne.

Mr Ryan told police that Mr Amey was yelling and struggling and pleading for them to let him go after being placed in the boot, so they stopped the car and Mr Trabert stabbed Mr Amey to the left side of the chest a number of times.

Mr Ryan claimed they then drove off again but after realising Mr Amey was still alive, Mr Trabert strangled him with rope somewhere around Gisborne.

Two days later, Mr Ryan claimed he, Mr Trabert and Ms Lindholm were driving with the body in the boot when they spotted Mount Korong and Ms Lindholm declared that "this was the spot," or something similar, the prosecutor said.

"He [Mr Ryan] said that Lindholm and Trabert were excited and at times, while driving up Mount Korong, looking for a place to leave the deceased's body, Lindholm was sitting on Trabert's lap."

Ms Lindholm later denied any involvement in the alleged murder after her arrest.